Bash

Referencias

• making bash easier

Quitar permisos de cuarentena en mac os

> find . -type d -exec xattr -d com.apple.quarantine  {} \;
> find . -type f -exec xattr -d com.apple.quarantine  {} \;

Buscar fichero que cumplan un patrón en el nombre y eliminarlos

Cuidado que borra sin preguntar!!!

find . -name "*2021-01-02*" -delete

RESIZE - Redimiensionar imágenes

> for file in *.jpg; do convert $file -resize 1140 $file; done

CROP - Recortar imágenes

> for file in *.jpg; do convert $file -gravity Center -crop 1140x488+0+0 $file; done

Operaciones con ficheros

Bash File Testing

• -b filename - Block special file
• -c filename - Special character file
• -d directoryname - Check for directory Existence
• -e filename - Check for file existence, regardless of type (node, directory, socket, etc.)
• -f filename - Check for regular file existence not a directory
• -G filename - Check if file exists and is owned by effective group ID
• -G filename set-group-id - True if file exists and is set-group-id
• -k filename - Sticky bit
• -L filename - Symbolic link
• -O filename - True if file exists and is owned by the effective user id
• -r filename - Check if file is a readable
• -S filename - Check if file is socket
• -s filename - Check if file is nonzero size
• -u filename - Check if file set-user-id bit is set
• -w filename - Check if file is writable
• -x filename - Check if file is executable

How to use:

    
      #!/bin/bash
      file=./file
      if [ -e "$file" ]; then
          echo "File exists"
      else
          echo "File does not exist"
      fi

      # A test expression can be negated by using the ! operator
      #!/bin/bash
      file=./file
      if [ ! -e "$file" ]; then
          echo "File does not exist"
      else
          echo "File exists"
      fi
    
  

Referencias

• How do I tell if a regular file does not exist in Bash?